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Sweep 29 Sep 2026 · 18:10Z Build v2.1.285 506 read Stable v2.1.280 Latest v2.1.285 Next v2.1.285 Feeds RSS JSON llms.txt llms-full.txt Unofficial

Claude Code v2.1.285 ·

Some tools no longer lock a session into one isolation mode

Tools that Claude Code now treats as web tools no longer lock the session into a single isolation mode, and that check now depends on the session

You'll notice Improvements
JSON All of v2.1.285
You'll noticeTier: how much it should matter to you
2Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
ElsewhereArea: what it touches
ImprovementsKind: in v2.1.285,
ImprovementsSection of the release
What

When certain tools run, Claude Code can lock the session into one isolation mode for the rest of the conversation. A tool is an action Claude Code takes, such as running a command. Isolation is how separated that work is kept from the rest of your system.

Before this build, a tool's category was used directly to decide whether to set that lock. The check now also depends on the current session. Tools that fall into one particular category are treated as web tools, and they no longer set the lock.

Why

Running some tools may no longer tie the rest of the session to a single isolation mode.

How sure we are
Something disagreesSomething we can check disagrees with this entry, or the writer said they could not settle it.
The writer flagged doubtIt is not clear which tools fall into the category that is now treated as web tools.

See this entry in the whole of v2.1.285 →

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